Wireless communication device and wireless communication method

ABSTRACT

The present disclosure relates to a wireless communication device and a wireless communication method. The wireless communication device according to one embodiment comprises one or more processors, wherein the processor(s) is/are configured to acquire the type of information to be transmitted via device-to-device communication, wherein the type is one of a plurality of types at least including a first type and a second type; and the processor(s) is/are also configured to determine a resource use manner and a power control manner which are used for transmitting information at least according to the type of the information.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.15/742,212, filed Jan. 5, 2018, which is based on PCT filingPCT/CN2016/088562, filed Jul. 5, 2016, and claims priority to CN201510395183.6, filed Jul. 7, 2015, the entire contents of each areincorporated herein by reference.

FIELD

The present disclosure generally relates to the field of wirelesscommunications, and in particular to a wireless communication device anda wireless communication method.

BACKGROUND

Device-to-device (D2D) communication generally refers to a communicationin which user data can be transmitted directly between terminals withoutbeing relayed via a network. D2D communication can reduce a load of abase station and can remedy the defect that cellular devices outside ofthe coverage of the base station cannot communicate effectively.

D2D communication can be applied to various scenarios. For example,traffic data of user plane may be directly transmitted locally withouttransmitting via network side, to offload a cellular network traffic,for example; wireless communication between terminals are ensured withthe D2D communication in a case where a natural catastrophe occurs andtraditional communication network infrastructures are damaged: and D2Dcommunication enhanced for the Internet of Things, etc.

SUMMARY

In the following, a brief overview of embodiments of the presentdisclosure is given below to provide basic understanding to some aspectsof the present disclosure. It should be understood that this overview isnot an exhaustive overview of the present disclosure. It is neitherintended to determine a critical part or an important part of thepresent disclosure, nor to limit the scope of the present disclosure.The object of the overview is only to give some concepts in a simplifiedmanner, which serves as a preface of a more detailed description later.

A wireless communication device is provided according to an embodiment.The device includes at least one professor. The professor is configuredto acquire the type of information to be transmitted via adevice-to-device communication, wherein the type is one of multipletypes which include at least a first type and a second type. Theprocessor is further configured to determine a resource utilizationmanner and a power control manner for transmitting the information atleast based on the type of the information.

A wireless communication method is provided according to anotherembodiment. The method includes a step of acquiring the type ofinformation to be transmitted via a device-to-device communication,wherein the type is one of multiple types which include at least a firsttype and a second type. The method further includes a step ofdetermining a resource utilization manner and a power control manner fortransmitting the information at least based on the type of theinformation.

A wireless communication device for base station side is providedaccording to yet another embodiment. The device includes at least oneprocessor. The professor is configured to determine the type ofinformation to be transmitted by a user equipment via a device-to-devicecommunication based on indication information from the user equipment,wherein the type is one of multiple types which include at least a firsttype and a second type. The processor is further configured todetermine, based on the type, a resource scheduling manner and a powercontrol manner for the user equipment to transmit the information.

A wireless communication method for base station side is providedaccording to still another embodiment. The method includes a step ofdetermining the type of information to be transmitted by a userequipment via a device-to-device communication based on indicationinformation from the user equipment, wherein the type is one of multipletypes which include at least a first type and a second type. The methodfurther includes a step of determining, based on the type, a resourcescheduling manner and a power control manner for the user equipment totransmit the information.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure may be better understood with reference to thedescription hereinafter in conjunction with the drawings. Same orsimilar components are indicated by to same or similar reference numbersthroughout the drawings. The drawings, together with the detaileddescription below, are incorporated in and form a part of thespecification, for further illustrating preferred embodiments of thepresent disclosure with examples and explaining the principle andadvantages of the present disclosure. In the drawings:

FIG. 1 is a block diagram showing a configuration example of a wirelesscommunication device according to an embodiment of the presentdisclosure:

FIG. 2 is a block diagram showing a configuration example of a wirelesscommunication device according to another embodiment of the presentdisclosure;

FIG. 3 is a block diagram showing a configuration example of a wirelesscommunication device according to yet another embodiment of the presentdisclosure:

FIG. 4 is a block diagram showing a configuration example of a wirelesscommunication device according to still another embodiment of thepresent disclosure:

FIG. 5 is a block diagram showing a configuration example of a wirelesscommunication device according to another embodiment of the presentdisclosure;

FIG. 6 is a flowchart showing a process example of a wirelesscommunication method according to an embodiment of the presentdisclosure;

FIG. 7 is a block diagram showing a configuration example of a wirelesscommunication device for base station side according to an embodiment ofthe present disclosure:

FIG. 8 is a block diagram showing a configuration example of a wirelesscommunication device for base station side according to anotherembodiment of the present disclosure;

FIG. 9 is a flowchart showing a process example of a wirelesscommunication method for base station side according to an embodiment ofthe present disclosure;

FIG. 10 is a block diagram showing an exemplary structure of a computerwhich implements the method and device according to the presentdisclosure;

FIG. 11 is a block diagram showing an example of an illustrativeconfiguration of a smart phone to which a technology according to thepresent disclosure can be applied:

FIG. 12 is a block diagram showing an example of an illustrativeconfiguration of an evolved base station (eNB) to which a technologyaccording to the present disclosure can be applied;

FIG. 13 is a block diagram showing an example of an illustrativeconfiguration of an automobile navigation device to which a technologyaccording to the present disclosure can be applied;

FIG. 14 is a schematic diagram for illustrating an example of a resourceutilizing manner for information of different types:

FIG. 15 is a schematic diagram for illustrating another example ofresource utilizing manner:

FIG. 16 is a flowchart illustrating an process example of a powercontrol manner for information of different types:

FIG. 17 is a flowchart for illustrating another process example of apower control manner:

FIG. 18 is a block diagram showing a configuration example of a wirelesscommunication device according to an embodiment of the presentdisclosure; and

FIG. 19 is a block diagram showing a configuration example of a wirelesscommunication device for base station side according to an embodiment ofthe present disclosure.

DETAILED DESCRIPTION OF EMBODIMENTS

Hereinafter, embodiments of the present disclosure will be described inconjunction with the drawings. Elements and features described in onedrawing or one embodiment of the present disclosure can be combined withelements and features shown in one or more of other to drawings orembodiments. It should be noted that representations and descriptions ofcomponents and processing which are irrelevant to the present disclosureand known by those skilled in the art are omitted in the drawings andthe specification for clarity.

As shown in FIG. 1, a wireless communication device 100 according to theembodiment includes a processor 110. The processor 110 includes anacquisition unit 11 i, a first determination unit 113 and a seconddetermination unit 115. It should be noted that, although theacquisition unit 111, the first determination unit 113 and the seconddetermination unit 115 are shown in the form of functional modules inthe figure, functions of the acquisition unit 111, the firstdetermination unit 113 and the second determination unit 115 may beimplemented by the processor 110 as a whole, and are not necessarilyimplemented by discrete actual components in the processor 110. Inaddition, although the processor 110 is shown with one block in thefigure, the communication device 100 may include multiple processors,and the functions of the acquisition unit 111, the first determinationunit 113 and the second determination unit 115 may be distributed inmultiple processors, so these functions are implemented by cooperationof the the multiple processors.

The acquisition unit 111 is configured to acquire the type ofinformation to be transmitted via a device-to-device communication. Thetype of the information is one of multiple types which include at leasta first type and a second type. Different types may correspond todifferent requirements on information transfer. For example, informationof different types may have different requirements on a time delay,coverage and a detection rate and so on.

According to an embodiment, the type of the information may bepredefined based on content of the information. In other words,information with specified content is defined to have a specified typebased on a predetermined correspondence. Accordingly, the “acquiring” ofthe type of the information by the acquisition unit 111 may bedetermining the type of the information according to the content of theinformation based on the predetermined correspondence. It should benoted that, the acquisition unit 111 does not necessarily determine thetype of the information by recognizing the content of the information,but may to determine the type of the information based on a source ofthe information, or directly obtain the type of information based on anidentifier and the like carried in the information, or the like. Forexample, information from a specific information source may beconsidered to have specific content, thereby having a specific type.Alternatively, while generating information by an information source, anidentifier may be added in the information based on the content of theinformation or an identifier indicating the type of the information maybe directly carried in the information.

As an example of information classification, information may beclassified into safety information (a first type) and non-safetyinformation (a second type) based on inherent safety features of theinformation. For example, as a typical scenario for application of theInternet of things, the D2D communication may include communicationbetween a vehicle and a related entity (V2X communication). The V2Xcommunication may include, for example, vehicle-to-vehicle (V2V)communication, vehicle-to-installation (V2I) communication,vehicle-to-pedestrian (V2P) communication and the like. Informationtransmission of the V2X may be a broadcast or a unicast. Taking a V2Xapplication as an example, safety information may include, for example,an emergency vehicle alarm, a collision danger alarm, an auxiliaryprompt for lane-switching decision, a road danger/construction prompt,cooperation information for automatic vehicle-driving, and the like,which has a high requirement on a time delay, coverage and a detectionrate and the like. The non-safety information may include, for example,mobility information, information on convenience and the like, which hasa lower requirement on the above aspects for information transfer ascompared with the safety information. However, the classification mannerof safety information and non-safety information is not limited toinformation involved in the V2X application, and the aboveclassification manner can be adopted as long as the D2D communicationinvolves information with a safety feature. It should be noted that,Proximity Services-based Direct Communication (ProSe DirectCommunication) is introduced in the current version 12 of 3GPP LTE-Astandard specification, in which direct communication between userequipments is defined as the mode of ProSe Direction Communication.Therefore, the D2D communication described in the present disclosurecontains the ProSe Direct Communication, that is, D2D communicationimplemented under the LTE-A standard.

In addition, in different scenarios, information with the same contentmay have different requirements on the coverage and detection rate andthe like. Still taking a V2X application as an example, highway exitcharge information may have different requirements on the coverage andthe detection rate in a scenario of a high vehicle density and in ascenario of a low vehicle density.

Accordingly, according to an embodiment, the type of information ispredefined based on both the content of the information and a scenarioin which the information is to be sent.

Still referring to FIG. 1, the first determination unit 113 isconfigured to determine a resource utilization manner for transmittinginformation at least based on the type of the information. In otherwords, the resource utilization manner for transmitting the informationis determined in consideration of the type of the information, but thetype of the information may not be a unique factor for determining theresource utilization manner.

In the existing D2D communication, a resource utilization manner isdetermined without considering the type of D2D information. With thesolution of the present disclosure, the resource utilization manner fortransmitting information is determined for different types ofinformation, thereby more reasonably using resources for informationtransmission. For example, as described in conjunction with embodimentsbelow, a resource utilization manner may be determined for safetyinformation to achieve a high transmission performance of the safetyinformation, such as small interference and high signal receptionstrength.

Besides, the second determination unit 115 is configured to determine apower control manner for transmitting information at least based on thetype of the information. In other words, the power control manner fortransmitting the information is determined in consideration of the typeof the information, but the type of the information may not be a uniquefactor for determining the power control manner.

The existing D2D power control is made without considering a requirementon a D2D information transmission quality, hence is not adapted to thecharacteristic of different transmission quality requirements. With thesolutions of the present disclosure, power control manner fortransmitting information is determined for information of differenttypes, thereby the information of respective types can be transmittedwith more reasonable powers, and a time delay caused by, for example, apower control process when an information type is switched can bereduced.

Next, some embodiments will be described, in which a resourceutilization manner for transmitting information is determined based onthe type of the information, and a power control manner for transmittingthe information is determined based on the type of the information.

According to an embodiment, the first determination unit 113 isconfigured to select a communication resource for transmittinginformation of a first type, from dedicated communication resourceswhich are only used for device-to-device communication. In other words,the information of the first type is transmitted over a dedicatedfrequency, thereby avoiding same frequency interference. As describedabove, the information of the first type is, for example, safetyinformation.

Preferably, frequency spectrum resources orthogonal to one another inthe dedicated communication resources may be allocated for transmissionof different information of the first type, thereby reducinginterference between the transmitted different information of the firsttype.

In addition, the first determination unit 113 may be configured toselect a communication resource for transmitting information of thesecond type from shared communication resources. The sharedcommunication resource can be used for the D2D communication andcommunication between a base station and a user equipment. As describedabove, the information of the second type is, for example, non-safetyinformation. However, the present disclosure is not limited to theclassification manner of the safety information and non-safetyinformation, and may include various other classification manners. Thefirst type and the second type correspond to information havingdifferent transmission priorities respectively.

According to an example, the first determination unit 113 may beconfigured to select a communication resource for transmitting theinformation of the second type from reserved communication resources inthe shared communication resources. As compared with the communicationbetween the base station and the user equipment, the D2D communicationcan have a priority in using the reserved communication resource.

In the following, an example of a communication resource utilizationmanner determined by the first determination unit 113 will be describedin conjunction with schematic diagrams of FIG. 14 and FIG. 15.

FIG. 14 and FIG. 15 show limited resource utilization solutions involvedin the embodiments of the present disclosure, in which reservedresources are limitedly allocated based on features having differentresource requirements such as different service priorities or differentservice quality requirements.

Specifically, as shown in FIG. 14, a dedicated resource is allocated toinformation of the first type, such as safety information. A reservedresource can be used by a wireless communication device such as a V2Xdevice according to the embodiment and can also be used by a basestation and other user equipments, and an uplink resource may bemultiplexed. The V2X device has a higher priority in using the reservedresource. When transmitting information of the second type, the basestation may firstly allocate an available reserved resource to theinformation. For a traffic transmission of the base station, a reservedresource can be allocated for the traffic transmission only if otherresources are all unavailable. That is to say, when scheduling resourcesfor transmission between the base station and the user equipment, thebase station firstly determines whether other uplink resources of LTEare available, and allocates the reserved resource if the other uplinkresources of LTE are all unavailable. In addition, as will be describedin detail below, in a certain case, a base station traffic allocated tothe reserved resource may be kicked out and allocated with otherresources.

Besides, according to an embodiment, the reserved communication resourcemay include a communication resource of an unlicensed frequency band.The unlicensed frequency band is, for example, a broadcast televisionfrequency band, a WiFi frequency band, a radar frequency band and thelike other than a licensed frequency band of a cellular communicationnetwork.

In view of that traffics having different requirements on a quality ofservice have different resource requirements, a licensed frequency bandresource may be allocated, with a priority, to a traffic having a highrequirement on the quality of service, while an unlicensed frequencyband resource may be firstly allocated to a traffic having a lowrequirement on the quality of service. FIG. 15 shows an exemplary mannerin which an unlicensed frequency band resource used by a LicensedAssisted Access (LAA) system is used as a limited reserved resource. Ina case of transmitting traffic information having a low requirement onquality of service (QoS) (such as a non-real time data traffic), anunlicensed frequency band resource may be firstly allocated for thetransmission with the LAA technology. In the case of transmittingtraffic information having a high requirement on QoS (such as areal-time data traffic or information of payment service having acertain requirement on quality of transmission), a frequency resourceavailable for long term evolution (LTE) may be firstly allocated for thetransmission; an LAA unlicensed frequency band resource may be allocatedfor the transmission only if there is no available LTE resource, andonce there is an available LTE resource again, it may be switched backto use the LTE frequency resource.

Besides, according to an embodiment, in the case that a reservedcommunication resource is used, information indicating an occupation onthe reserved resource may be generated. The embodiment is describedbelow by referring to FIG. 2.

As shown in FIG. 2, a wireless communication device 200 according to theembodiment includes a processor 210. The processor 210 includes anacquisition unit 211, a first determination unit 213, a seconddetermination unit 215 and a generation unit 217. Configurations of theacquisition unit 211, the first determination unit 213 and the second todetermination unit 215 are similar to those of the acquisition unit 111,the first determination unit 113 and the second determination unit 115described by referring to FIG. 1. The generation unit 217 is configuredto generate indication information representing an occupation on areserved communication resource, in the case that the firstdetermination unit 213 determines to use the reserved communicationresource. Based on the indication information, the base station may beindicated not to allocate the occupied resource to other traffic, orkick out a base station traffic that the reserved resource has beenallocated for and allocate other resources for the service.

Next, returning to refer to FIG. 1, it is described in conjunction withspecific embodiments that the second determination unit 115 determines apower control manner for transmitting information based on the type ofthe information.

According to an embodiment, the second determination unit 115 may beconfigured to determine a transmission power for information of thefirst type as a first predetermined power. The first predetermined powermay be a power which is preset and can ensure a predetermined level ofcoverage and detection rate. By directly setting the transmission powerfor the information of the first type as a predetermined power, a powercontrol delay can be avoided, meanwhile requirements on the coverage anddetection rate can be met. With the configuration, it can be ensuredthat information having a high requirement on transmission such assafety information is sent timely and effectively. It should be notedthat in an existing LTE-A communication standard, for example, atransmission power of a user equipment is dynamically controlled by abase station based on different wireless transmission environmentsincluding a path loss, a shadow, fast fading and the like.

In another aspect, the second determination unit 115 may be configuredto determine a transmission power for the information of the second typebased on a priority of the information. For example, the priority may beassociated with coverage and a detection rate of the information.

In the following, description is made by still taking the classificationof safety information and non-safety information as an example. Sincethe non-safety information to differs from a base station traffic in aresource utilization priority, the non-safety information may be furtherdivided into two or more sub-levels, such as a level P1 and a level P2.P1 sub-information has a higher frequency utilization priority than thebase station traffic and P2 sub-information has a same frequencyutilization priority as the base station traffic or a lower frequencyutilization priority than the base station traffic. The division of theinformation levels and some examples are given as follows.

P1 information: has high requirements on coverage and a detection rateamong non-safety information, has a higher frequency utilizationpriority than the base station traffic, and is closely associated withmobility generally, such as information on traffic efficiencyimprovement, including road speed limit prompt, traffic light prompt,traffic restriction management, parking guide information, turningprohibiting indication and the like.

P2 information: for example other types of information among V2Xnon-safety information, has a frequency utilization priority same as orlower than that of the base station traffic, such as information oninformation entertainment service, including a service informationannouncement, a commercial advertisement, local electronic payment,transaction information and the like, which has a relatively lowrequirement on coverage and a detection rate.

The above sub-information covers information types of many services,hence different sub-information may be different in the coverage and thedetection rate. In order to apply a finer power control to improve afrequency spectrum utilization rate and reduce interference, the abovesub-information may be further ranked and classified based onrequirements on related parameters such as the coverage and thedetection rate. For example, the P2 sub-information may be furtherdivided and represented with a priority i=1, 2, . . . , N, and anexample is given as follows:

P2-1: information in the P2 information having high requirements on thecoverage and the detection rate, such as a traffic jam alarm;

P2-2: information having lower requirements on the coverage and thedetection rate than to P2-1, such as transaction payment serviceinformation;

. . .

P2-N: information having lowest requirements on the coverage and thedetection rate, such as a commercial advertisement.

Next, the requirements on the coverage and the detection rate aredescribed by taking a V2X application as an example.

Coverage and a detection rate in V2X power control is that a determineddetection rate a % is required to be reached for a V2X communicationwithin a certain range d.

In the case that non-safety information is transmitted in a V2X, aminimum coverage and detection rate, with which a basic requirement ofthe information type (P1, P2-1, P2-2, . . . , P2-N) of the non-safetyinformation is met, is determined.

Related Definitions of a Power:

P_(max): a maximum available transmission power of a V2X device, whichcan meet a requirement on safety information transmission of V2X. Forexample, the above first predetermined power may be determined asP_(max) for the safety information.

P_(i): a power-control power corresponding to the information type,which can be calculated with a power control formula. An exemplary wayfor calculating the power will be described later.

P: a transmission power of the V2X device, which is the transmissionpower finally adopted.

P_(min): a minimum transmitting power, which is pre-configured for thenon-safety information type to meet a minimum requirement on coverageand a detection rate corresponding to the non-safety information type.In the case that the above information classification is adopted,minimum transmitting powers corresponding to respective types may meetthe following relationship for example:

P_(max)>P_(min1)≥P_(min2_1)≥P_(min2_2) . . . ≥P_(min2_N), where P_(min1)is a minimum transmitting power for the P1 sub-information, andP_(min2_i) is a minimum transmitting power for the P2 sub-informationcorresponding to priority i.

With the wireless communication device according to the embodiments ofthe present disclosure, corresponding transmitting powers can bedetermined based on different information types. However, correspondingtransmission powers can also be determined based on power controlparameters for different information types from a base station.

According to an embodiment, the second determination unit 115 isconfigured to determine a transmission power for information based on apower control parameter from the base station. The power controlparameter is associated with a priority of the information. In otherwords, in the embodiment, the process of determining the power controlparameter based on the classification of the information is performed bybase station side, and the power control parameter is notified to a userequipment.

A power control parameter may be separately acquired for a type ofinformation to be transmitted, or power control parameters for multipletypes may be acquired together.

According to an embodiment, the second determination unit 115 isconfigured to determine a transmission power for information based on apower control parameter set from a base station. The power controlparameter set includes power control parameters for information withdifferent priorities. With the configuration, a communication loadcaused by sending power control parameters for multiple times can beeffectively reduced, which is particularly effective for an applicationscenario in which an information transmitting power needs to bedetermined for multiple times.

Moreover, according to an embodiment, the second determination unit 115may be further configured to determine a predetermined power as aninitial power for transmitting information, for a user equipment tooperate, and adjust the transmission power for the information based ona power control parameter from a base station. With the configuration,the initial power can be determined without causing a power controldelay, and the transmission power can be subsequently adjusted inresponse to an indication from the base station.

In the following, an exemplary way for subsequently determining thetransmitting power in response to the indication from the base stationis described. A transmitting power for information may be determinedwith the following equation 1:

$\begin{matrix}{P = {\min \left\{ \begin{matrix}P_{{cmax},i} \\{P_{o} + {\alpha \cdot {PL}} + {101{g(M)}} + \Delta_{MCS}}\end{matrix} \right.}} & (1)\end{matrix}$

where P_(o) and α are two adjustable power control parameters configuredby an upper layer of the base station, P_(o) is a cell specificparameter, and α is a path loss compensation parameter. P_(cmax,i) is amaximum effective transmission power over a sub-carrier i of a basestation c, and M represents the number of physical resource blocks of afrequency spectrum occupied by a V2X transmission. Δ_(MCS) is a poweroffset determined by modulation and encoding schemes defined in the 3rdGeneration Partnership Project (3GPP). Here, Δ_(MCS) may be set as 0,the value of P_(o) is selected to match with specific modulation andencoding schemes. PL is a path loss, and a user equipment (UE) mayobtain the path loss by measuring a reference signal. In an example, thebase station may configure a P_(o) for the V2X communication differentfrom those for other communications. Further, different P_(o) may beconfigured based on different information types.

The wireless communication device according to the embodiment of thepresent disclosure may serve as a user equipment. As aforementioned, theuser equipment may be, for example, a vehicle device, and accordinglythe transmitted information may be V2X information.

In addition, as aforementioned, the user equipment may determine thetransmission power for information of the second type based on the powercontrol parameter from the base station.

Accordingly, in an embodiment shown in FIG. 3, a wireless communicationdevice 300 includes a processor 310. The processor 310 includes anacquisition unit 311, a first determination unit 313, a seconddetermination unit 315 and a generation unit 317. Configurations of theacquisition unit 311, the first determination unit 313 and the seconddetermination unit 315 are similar to those of the acquisition unit 111,the first determination unit 113 and the second determination unit 115which are described above.

The generation unit 317 is configured to generate indication informationrelated to a priority of the information of the second type, in the casethat information to be transmitted is the information of the secondtype. The priority of the information may be predefined based on contentof the information, such as the aforementioned P2-1 to P2-N.

The indication information generated by the generation unit 317 may besent to the base station for determining a corresponding power controlparameter.

Accordingly, as shown in FIG. 4, a wireless communication device 400according to an embodiment includes a processor 410. The processor 410includes an acquisition unit 411, a first determination unit 413, asecond determination unit 415 and a generation unit 417. Configurationsof the acquisition unit 411, the first determination unit 413, thesecond determination unit 415 and the generation unit 417 are similar tothose of corresponding units which are described above. In addition, thewireless communication device 400 further includes a transceiver 420.The transceiver 420 is configured to send indication informationgenerated by the generation unit 417 to a base station via a physicaluplink control channel (PUCCH).

FIG. 5 shows a configuration example of a wireless communication device500 according to another embodiment. The wireless communication device500 includes a processor 510 and a transceiver 520. The processor 510includes an acquisition unit 511, a first determination 513 and a seconddetermination unit 515, configurations of which are respectively similarto those of the aforementioned acquisition units, first determinationunits and second determination units. The transceiver 520 is configuredto receive radio resource control (RRC) signaling from a base station.The radio resource control signaling carries a power control parameterfor a user to transmit information, such as the above P_(o) and α. Inthe embodiment, a transmission power for information in D2Dcommunication is determined based on the power control parameter fromthe base station. In a preferred example, the RRC signaling sent by thebase station contains multiple groups of power control parameters fordifferent information types. In a case where the type of information tobe transmitted is changed, the user equipment can timely determine areasonable transmission power for operation without waiting a powercontrol parameter to be retransmitted by the base station.

In addition, although not shown in the figure, the processor 510 mayfurther include a unit similar to the generation unit 417 described withreference to FIG. 4, for generating indication information on a priorityof information of the second type. However, in some embodiments, thegeneration unit is unnecessary. For example, in the case that thetransmission power for the information is determined based on the powercontrol parameter set (such as the above multiple groups of powercontrol parameters) received from the base station (where the powercontrol parameter set includes power control parameters for informationwith different priorities), it is unnecessary to send indicationinformation on a priority of specific information to the base station.

As shown in FIG. 5, optionally, the wireless communication device 500may further include a storage 530 configured to store the power controlparameter sent from the base station. The power control parameter storedin the storage 530 is used, for example, in the case that the type ofinformation to be sent is changed, a corresponding power controlparameter may be determined based on the contents stored in the storage,thereby reducing a communication overhead caused by requesting the powercontrol parameter from the base station.

Next, examples of resource scheduling and power control for informationof P1 type and information of P2 type which are taken as exemplaryinformation types are respectively described in conjunction with FIG. 16and FIG. 17, in which, a V2X device is taken as an example of a wirelesscommunication device. However, it should be understood that, the presentdisclosure is not limited to details in the following example.

As shown in FIG. 16, when the V2X device is to transmit P1sub-information, a process of resource scheduling and power control isas follow:

In step S1610, when initially transmitting the P1 sub-information, theV2X device firstly selects a resource from a reserved resource pool of ashared resource pool, and adopts a predefined power P_(min1) as aninitial transmission power. Here, the initial transmitting power isadopted for transmission firstly instead of obtaining a power controlparameter from the base station and then transmitting with apower-control power, thereby reducing an interaction time delay. Then,the base station may re-configure a resource and a transmission powerfor the device.

Meanwhile, a power control and resource request is sent to the basestation. The request information, for example, may contain one bitinformation for representing whether information being currentlytransmitted is P1 sub-information. For example, one bit in uplinkcontrol information (UCI) in the PUCCH is used for indicting whethercurrent information is P1 sub-information.

After receiving the request information, the base station learns thatthe V2X device currently transmits the P1 sub-information. Since the P1sub-information has a higher frequency utilization priority than anormal base station traffic, the base station may start a back-offmechanism. An example of the back-off mechanism is as follows.

If there is currently a normal base station UE using a same uplinkfrequency resource as the V2X device, the UE will be allocated withother available frequency resources (the above mentioned kicking out),so that the part of uplink frequency resource is dedicated for the V2Xdevice. Meanwhile, the part of uplink frequency resource is labeled astemporally non-sharable and cannot be re-shared until the base stationexits from the back-off mechanism.

Next, in step S1620, the base station configures parameters for allinformation types (including P1 sub-information and P2 sub-information)of non-safety information, such as α and a group of P_(0i) (i=0, 1, 2, .. . , N), based on a requirement on a signal to interference plus noiseratio and requirements on coverage and a detection rate for differentinformation types.

The V2X device receives a power control parameter sent by the basestation, and for to example, may obtain a path loss (PL) in thefollowing manner:

the base station calculates PL based on information sent by the V2Xdevice, for example a sounding reference signal (SRS), and then the basestation sends the PL to the V2X device as a power control parameter; or

the V2X device calculates the PL based on a reference signal (RS).

The path loss parameter is not required in the case that a is set aszero. The V2X device obtains values of multiple groups of parametersP_(0i) and α, then calculates power-control power based on the aboveequation (1), and may store related parameters in a parameter table suchas the following table 1.

TABLE 1 P1 P2-1 P2-2 . . . P2-N P₀ _(i) P₀ ₀ P₀ ₁ P₀ ₂ P₀ _(N) α α α α αP_(v2x) _(i) P_(v2x) ₀ P_(v2x) ₁ P_(v2x) ₂ P_(v2x) _(N)

The power-control power of the V2X device transmitting the P1sub-information is P_(v2x_0), and the transmission power is selectedbased on the following equation (2):

$\begin{matrix}{P = \left\{ \begin{matrix}P_{v\; 2{x\_ j}} & {P_{v\; 2{x\_ j}} \leq P_{\max}} \\P_{\max} & {P_{v\; 2{x\_ j}} > P_{\max}}\end{matrix} \right.} & (2)\end{matrix}$

The base station may update, once for every time duration T, the powercontrol parameters P_(0i) and α for the V2X device transmitting theinformation. Then, the V2X device can update the parameter tableaccordingly and obtains a new transmission power.

In the case that the information to be transmitted by the V2X device ischanged into P2 sub-information (S1630), a power-control power for theinformation can be directly obtained from the parameter table.Preferably, in the case that the path loss changes rapidly, a powercontrol parameter for the information may be obtained from theparameters and the power-control power is calculated based on the pathloss measured currently. Then, a transmission power is selected based onthe equation (2). Resources used by the original information are usedcontinuously. Meanwhile, it is reported to the base station that P2sub-information is currently transmitted. The base station re-allocatesresources to the P2 sub-information, thereby reducing a time overhead.

After receiving the information, the base station learns that the V2Xdevice no longer transmits the P1 sub-information and may exit from theback-off mechanism, so that the part of labeled frequency resource canbe re-multiplexed by the base station UE.

As shown in FIG. 17, in the case that the V2X is to transmit the P2sub-information, a process of resource scheduling and power control isas follow.

In S1710, when initially transmitting the P2 sub-information, the V2Xdevice firstly selects a resource from a reserved resource pool of ashared resource pool, and adopts a predefined power P_(min2_i) as aninitial transmission power. Here, the initial transmitting power isadopted for transmission firstly, instead of obtaining a power controlparameter from the base station and then transmitting with thepower-control power, thereby reducing an interaction time delay. Then,the base station may re-configure a resource and a transmission powerfor the device.

Meanwhile, a power control and resource request is sent to the basestation by the V2X device. The request information, for example, maycontain one bit for representing whether the information being currentlytransmitted is P2 sub-information, for example:

one bit in UCI in the PUCCH is used for indicting whether theinformation being currently transmitted is P2 sub-information.

Next, in S1720, after receiving the request information, the basestation learns that the V2X device currently transmits the P2sub-information. The base station configures parameters for allinformation types (including P1 sub-information and P2 sub-information)of non-safety information, such as a group of P_(0i) (i=0, 1, 2, . . . ,N) and a α, based on a requirement on a signal to interference plusnoise ratio and requirements on coverage and a detection rate fordifferent information types. A reference solution of parameterconfiguration is described below.

The path loss compensation parameter α has a configuration manner sameas a traditional configuration manner of LTE. Alternatively, α may alsobe directly set as zero. The parameter P_(0i) can be determined based onequation (3) and equation (4).

P _(0_i) =P _(0_NOMINAL_PUSCH) +P _(0_Device)  (3)

P _(0_Device) =μ·P _(0_Normal_UE) +η·P _(0_V2X-D)  (4)

where P_(0_NOMINAL_PUSCH) is a cell nominal power which is broadcastedvia an SIB2 system message (UplinkPowerControlCommon), P_(0_Device) is anominal power offset obtained based on interference from the basestation side and a V2X information request, and may be calculated withequation (4). P_(0_Normal_UE) is a nominal power offset meeting acurrent acceptable interference requirement of the base station,P_(0_V2X-D) is a nominal power offset calculated based on requirementson coverage and a detection rate of the V2X information, P and q arecorresponding weighting factors, where 0≤μ,η≤1 and μ+η=1. The values ofthe weighting factors may be adjusted as needed. In this way, there maybe multiple groups of parameters P_(0_Device) for different V2Xinformation types. The multiple groups of parameters each may be sent tothe UE via dedicated signaling such as RRC signaling (an informationelement UplinkPowerControlDedicated in the RRC signaling). The UE thencalculates P_(0i) based on equation (3). The dedicated signaling may becarried by a data channel such as PUSCH. It should be understood that,as aforementioned, the base station may also explicitly notify the UE ofmultiple P_(0i) via the RRC signaling

The base station may transmit one a parameter and a group of P_(0i)parameters to the V2X device in the above way.

The V2X device receives a power control parameter sent by the basestation, and the path loss PL may be determined in the following manner:

the base station calculates PL based on information sent by the V2Xdevice such as SRS, and then sends the PL to the V2X device as a powercontrol parameter; or the V2X device calculates the PL based on RS.

The path loss parameter is not required in the case that a is set aszero. The V2X device obtains values of multiple groups of parametersP_(0i) and one α. Then power-control power is calculated with equation(1), and related parameters are stored in the parameter table. Thestored parameter may be determined as needed.

The V2X device can obtain a power-control power P_(v2xj) correspondingto a P2-j sub-information type from the parameter table. The P2sub-information has a lower priority than the base station traffic,hence a transmission power for the P2 sub-information is selected basedon the above equation (2).

The base station may update, once for every time duration T, the powercontrol parameters P_(0i) and α for the V2X device transmitting theinformation. Then, the V2X device updates the parameter table andobtains a new transmission power based on equation (2).

In the case that current transmission information of the V2X device ischanged within the P2 sub-information, a corresponding power-controlpower may be directly obtained from the parameter table. Preferably, inthe case that the path loss changes rapidly, a corresponding powercontrol parameter may be obtained from the parameter table and thepower-control power is calculated from a current newly-measured pathloss. Then, a transmission power is selected. Here, it is unnecessary torequest the power control parameter from the base station, therebysaving the time and reducing resource overheads for signalingtransmission.

In the case that the type of the V2X transmission information is changedand P1 sub-information needs to be transmitted (S1730), a power-controlpower P_(v2x) ₀ for the P1 sub-information may be directly obtained froma storage table. Preferably, in the case that the path loss changesrapidly, a power control parameter may be obtained from the parametertable and a power-control power is calculated from a currentnewly-measured path loss. In addition, resources for the originalinformation are used continuously, and it is reported to the basestation that the P1 sub-information is currently transmitted. The basestation re-allocates resources for the P1 sub-information, therebyreducing a time overhead.

It is apparent that some methods and processing are also disclosed inthe description of the embodiments of the wireless communication deviceabove. Below, a wireless communication method according to an embodimentof the present disclosure is described without repeating some detailsdescribed above.

As shown in FIG. 6, a wireless communication method according to theembodiment includes a step S610 of acquiring the type of information tobe transmitted via a device-to-device communication. The type is one ofmultiple types which include at least a first type and a second type. Asdescribed above, information of different types may have differentrequirements on information transfer, for example, have differentrequirements on a time delay, coverage and a detection rate and thelike. The type of the information may be predefined based on content ofthe information. More particularly, information of the first type may besafety information and information of the second type may be non-safetyinformation.

The method further includes a step S620 of determining a resourceutilization manner and a power control manner for transmitting theinformation at least based on the type of the information.

The method may be performed at user equipment (such as V2X device) side,or may be performed at base station side. Alternatively, the above stepsmay be respectively performed at the user equipment side and the basestation side.

Next, a configuration example of a wireless communication device at basestation side according to an embodiment of the present disclosure isdescribed. It should be noted that, some processing for resourcescheduling and power control at the base station side has been describedin the descriptions of the above embodiments. Hereinafter, a wirelesscommunication device at base station side according to the embodiment ofthe present disclosure is described without repeating some details whichhave been described.

As shown in FIG. 7, a wireless communication device 700 for base stationside according to an embodiment includes a processor 710. The processor710 includes a first determination unit 711, a second determination unit713 and a third determination unit 715.

The first determination unit 711 is configured to determine the type ofinformation to be transmitted by a user equipment via a device-to-devicecommunication, based on indication information from the user equipment.The type is one of multiple types which include at least a first typeand a second type. Information of different types may have differentrequirements on information transfer, for example, have differentrequirements on a time delay, coverage and a detection rate and thelike. The type of the information may be predefined based on content ofthe information. More particularly, information of the first type may besafety information and information of second type may be non-safetyinformation.

The second determination unit 713 is configured to determine a resourcescheduling manner for a user equipment to transmit the information,based on the type acquired by the first determination unit 711.

The third determination unit 715 is configured to determine a powercontrol manner for the user equipment to transmit the information, basedon the type acquired by the first determination unit 711.

According to an embodiment, the second determination unit 713 may beconfigured to select a communication resource for transmitting theinformation of the first type from dedicated communication resources.The dedicated communication resource is only used for device-to-devicecommunication.

In addition, the second determination unit 713 may be configured to, forthe information of the first type, allocate frequency spectrumsorthogonal to one another for to different user equipments, therebyreducing interference between transmissions of different information ofthe first type.

According to an embodiment, the second determination unit 713 may beconfigured to select a communication resource for transmitting theinformation of the second type from shared communication resources. Theshared communication resource can be used for the device-to-devicecommunication and communication between a base station and a userequipment.

In addition, the second determination unit 713 may be further configuredto select a communication resource for transmitting the information froma reserved communication resource in the shared communication resources.The reserved communication resource is allocated for thedevice-to-device communication with a priority as compared to basestation communication traffic.

As described above, in the case that the user equipment uses thereserved communication resource, a base station traffic for which thereserved communication resource is allocated may be kicked out andallocated with other resources.

Accordingly, as shown in FIG. 8, a wireless communication device 800 forbase station side according to an embodiment includes a processor 810.The processor 810 includes a first determination unit 811, a seconddetermination unit 813, a third determination unit 815 and adeactivation unit 817. Configurations of the first determination unit811, the second determination unit 813 and third determination unit 815are similar to those of the first determination unit 711, seconddetermination unit 713 and third determination unit 715 described withreference to FIG. 7. The deactivation unit 817 is configured to stopcommunication traffic of the base station from using a reservedcommunication resource, if the indication information from a userequipment indicates that the user equipment is to use the reservedcommunication resource. Specifically, the deactivation unit 817 may, forexample, generate an instruction for stopping the communication trafficof the base station from using the reserved communication resource.

Returning to refer to FIG. 7, according to an embodiment, the thirddetermination unit 715 may be configured to determine a priority ofinformation of the second type based on the indication information fromthe user equipment, and determine a power control parameter of theinformation based on the priority.

According to another embodiment, the third determination unit 715 may beconfigured to determine a power control parameter set for information ofthe second type. The power control parameter set includes power controlparameters for information with different priorities. With theconfiguration, a communication load caused by sending power controlparameters for multiple times can be effectively reduced.

Moreover, although not shown in the figure, the wireless communicationdevice for the base station side according to an embodiment may includea transceiver. For example, the transceiver is configured to receiveindication information sent by a user equipment via PUCCH and send RRCsignaling to the user equipment.

FIG. 9 shows a process example of a wireless communication method forbase station side according to an embodiment of the present disclosure.

In step S910, the type of information to be transmitted by a userequipment via device-to-device communication is determined based onindication information of the user equipment. The type is one ofmultiple types which include at least a first type and a second type.Information of different types may have different requirements oninformation transfer, for example, have different requirements on a timedelay, coverage and a detection rate and the like. The type of theinformation may be predefined based on content of the information. Moreparticularly, information of the first type may be safety informationand information of the second type may be non-safety information.

In step S920, a resource scheduling manner and a power control mannerfor the user equipment to transmit the information is determined basedon the type.

In addition, embodiments of the present disclosure also include awireless communication device shown in FIG. 18 and a wirelesscommunication device shown in FIG. 19.

As shown in FIG. 18, a wireless communication device 1800 according toan embodiment includes an acquisition apparatus 1801 and a determinationapparatus 1803.

The acquisition apparatus 1801 is configured to acquire the type ofinformation to be transmitted via a device-to-device communication. Thetype is one of multiple types which include at least a first type and asecond type.

The determination apparatus 1803 is configured to determine a resourceutilization manner and a power control manner for transmitting theinformation, at least based on the type of the information.

As shown in FIG. 19, a wireless communication device 1900 for basestation side according to an embodiment includes a first determinationapparatus 1901 and a second determination apparatus 1903.

The first determination apparatus 1901 is configured to acquire the typeof information to be transmitted by a user equipment via adevice-to-device communication, based on indication information from theuser equipment. The type is one of multiple types which include at leasta first type and a second type.

The second determination apparatus 1903 is configured to determine aresource scheduling manner and a power control manner for the userequipment to transmit the information, based on the type.

As examples, the steps of the above methods and the modules and/or unitsof the above devices can be realized by software, firmware, hardware orcombinations thereof. In the case where the present disclosure isrealized by software or firmware, a program constituting the softwareimplementing the above methods is installed in a computer with adedicated hardware structure (e.g. a general computer 1000 shown in FIG.10) from a storage medium or network, where the computer is capable ofimplementing various functions when installed with various programs.

In FIG. 10, a central processing unit (CPU) 1001 executes variousprocessing in to response to a program stored in a read-only memory(ROM) 1002 or a program loaded to a random access memory (RAM) 1003 froma storage section 1008. The data for the various processing of the CPU1001 may be stored in the RAM 1003 as needed. The CPU 1001, ROM 1002 andRAM 1003 are linked with each other via a bus 1004. An input/outputinterface 1005 is also linked to the bus 1004.

The following components are linked to the input/output interface 1005:an input section 1006 (including a keyboard, a mouse and the like), anoutput section 1007 (including displays such as a cathode ray tube(CRT), a liquid crystal display (LCD), a speaker and the like), astorage section 1008 (including a hard disc and the like), and acommunication section 1009 (including a network interface card such as aLAN card, a modem and the like). The communication section 1009 performscommunication processing via a network such as the Internet. A driver1010 may also be linked to the input/output interface 1005 as needed. Aremovable medium 1011 such as a magnetic disc, an optical disc, amagnetic optical disc and a semiconductor memory may be installed in thedriver 1010 as needed, so that the computer program read therefrom isinstalled in the storage section 1008 as appropriate.

In the case where the foregoing series of processing is achieved withsoftware, programs forming the software are installed from a networksuch as the Internet or a storage medium such as the removable medium1011.

It should be appreciated by those skilled in the art that the storagemedium is not limited to the removable medium 1011 shown in FIG. 10,which has program stored therein and is distributed separately from theapparatus so as to provide the programs to users. The removable medium1011 may be, for example, a magnetic disc (including a floppy disc(registered trademark)), a compact disc (including a compact discread-only memory (CD-ROM) and a digital versatile disc (DVD)), a magnetooptical disc (including a mini disc (MD) (registered trademark)), and asemiconductor memory. Alternatively, the storage medium may be the harddiscs included in the ROM 1002 and the storage section 1008 in whichprograms are stored, and can be distributed to users along with thedevice in which they are incorporated.

In addition, a program product storing machine-readable instructioncodes is further provided according to the embodiments of the presentdisclosure. The method according to the above embodiments of the presentdisclosure can be performed when the instruction codes is read andexecuted by a machine

Accordingly, a storage medium for carrying the program product in whichmachine-readable instruction codes are stored is also provided in thepresent disclosure. The storage medium includes but is not limited to afloppy disc, an optical disc, a magnetic optical disc, a memory card, amemory stick and the like.

The embodiments of the present disclosure may further relate to thefollowing electronic device. In the case that the electronic device isapplied at base station side, the electronic device may be implementedas any types of evolved node B (eNB), such as a macro eNB and a smalleNB. The small eNB may be an eNB of a cell having a smaller coveragethan the macro cell, such as a pico-cell eNB, a micro eNB and a home(femto) eNB. Alternatively, the electronic device may be implemented asany other types of base stations, such as a NodeB and a base transceiverstation (BTS). The electronic device may include a main body (alsoreferred to a base station device) configured to control wirelesscommunication, and one or more remote radio heads (RRHs) arranged at aposition different from a position of the main body. In addition,various types of terminals to be described below can operate as a basestation by temporarily or semi-persistently performing a function of thebase station.

When being applied at a user equipment side, the electronic device maybe implemented as a mobile terminal (such as a smart phone, a panelpersonnel computer (PC), a laptop PC, a portable game terminal, aportable/dongle mobile router and a digital camera) or a vehicleterminal (such as an automobile navigation device). In addition, theelectronic device may be a wireless communication module (such as anintegrated circuit module including one or more wafers) mounted on eachof the above terminals.

[Application Examples of a Terminal Device]

FIG. 11 is a block diagram showing an example of a schematicconfiguration of a smart phone 2500 to which the technology according tothe present disclosure may be applied. The smart phone 2500 includes aprocessor 2501, a memory 2502, a storage 2503, an external connectioninterface 2504, a camera 2506, a sensor 2507, a microphone 2508, aninput apparatus 2509, a display apparatus 2510, a speaker 2511, a radiocommunication interface 2512, one or more antenna switches 2515, one ormore antennas 2516, a bus 2517, a battery 2518 and an auxiliarycontroller 2519.

The processor 2501 may be for example a CPU or a system on chip (SoC),and controls functions of an application layer and an additional layerof the smart phone 2500. The memory 2502 includes RAM and ROM, andstores programs executed by the processor 2501 and data. The storage2503 may include a storage medium such as a semiconductor memory and ahard disk. The external connection interface 2504 refers to an interfaceconnecting an external device (such as a memory card and a universalserial bus (USB) device) to the smart phone 2500.

The camera 2506 includes an image sensor (such as a charge-coupleddevice (CCD) and a complementary metal oxide semiconductor (CMOS)), andgenerates a captured image. The sensor 2507 may include a group ofsensors such as a measurement sensor, a gyroscope sensor, a geomagneticsensor and an acceleration sensor. The microphone 2508 converts voiceinputted to the smart phone 2500 into an audio signal. The inputapparatus 2509 includes for example a touch sensor configured to detecttouch on a screen of the display apparatus 2510, a keypad, a keyboard, abutton or a switch, and receives an operation or information inputted bythe user. The display apparatus 2510 includes a screen (such as a liquidcrystal display (LCD) and an organic light-emitting diode (OLED)display), and displays an output image of the smart phone 2500. Thespeaker 2511 converts the audio signal outputted from the smart phone2500 into voice.

The radio communication interface 2512 supports any cellularcommunication scheme (such as LTE and LTE-advanced), and performswireless communication. The radio communication interface 2512 maygenerally include for example a baseband (BB) processor 2513 and a radiofrequency (RF) circuit 2514. The BB processor 2513 may perform forexample coding/decoding, modulation/demodulation andmultiplexing/demultiplexing, and perform various types of signalprocessing for wireless communication. Meanwhile, the RF circuit 2514may include for example a frequency mixer, a filter and an amplifier,and transmit and receive a wireless signal via the antenna 2516. Theradio communication interface 2512 may be a chip module on which the BBprocessor 2513 and the RF circuit 2514 are integrated. As shown in FIG.11, the radio communication interface 2512 may include multiple BBprocessors 2513 and multiple RF circuits 2514. Although FIG. 11 showsthe example in which the radio communication interface 2512 includesmultiple BB processors 2513 and multiple RF circuits 2514, the radiocommunication interface 2512 may include a single BB processor 2513 or asingle RF circuit 2514.

In addition to the cellular communication scheme, the radiocommunication interface 2512 may support an additional type of wirelesscommunication scheme, such as a short-distance wireless communicationscheme, a near field communication scheme and a wireless local areanetwork (LAN) scheme. In this case, the radio communication interface2512 may include a BB processor 2513 and an RF circuit 2514 for each ofthe wireless communication schemes.

Each of the antenna switches 2515 switches a connection destination ofthe antenna 2516 between multiple circuits (such as circuits fordifferent wireless communication schemes) included in the radiocommunication interface 2512.

Each of the antennas 2516 includes one or more antenna elements (such asmultiple antenna elements included in the MIMO antenna), and is for theradio communication interface 2512 to transmit and receive a wirelesssignal. As shown in FIG. 11, the smart phone 2500 may include multipleantennas 2516. Although FIG. 11 shows the example in which the smartphone 2500 includes multiple antennas 2516, the smart phone 2500 mayinclude a single antenna 2516.

In addition, the smart phone 2500 may include antennas 2516 fordifferent wireless to communication schemes. In this case, the antennaswitch 2515 may be omitted in the configuration of the smart phone 2500.

The processor 2501, the memory 2502, the storage 2503, the externalconnection interface 2504, the camera 2506, the sensor 2507, themicrophone 2508, the input apparatus 2509, the display apparatus 2510,the speaker 2511, the radio communication interface 2512 and theauxiliary controller 2519 are connected with one another via the bus2517. The battery 2518 supplies power to the modules of the smart phone2500 shown in FIG. 13 via a feed line. The feed line is partially shownwith a dash line in the figure. The auxiliary controller 2519, forexample, operates a minimum necessary function of the smart phone 2500in a sleep mode.

In the smart phone 2500 shown in FIG. 11, the transceivers described inconjunction with FIG. 4 and FIG. 5 can be implemented by the radiocommunication interface 2512. The storage described in conjunction withFIG. 5 may be implemented by the memory 2502 and the storage 2503. Atleast a portion of the functions of the units described with referenceto FIGS. 1 to 5 may be implemented by the processor 2501 or theauxiliary controller 2519. For example, an electric power consumption ofthe battery 2518 can be reduced in a way of performing a portion offunctions of the processor 2501 by the auxiliary controller 2519. Inaddition, the processor 2501 or auxiliary controller 2519 can perform atleast a portion of functions of the units described with reference toFIGS. 1 to 5 by executing programs stored in the memory 2502 or storage2503.

[Application Examples of a Base Station]

FIG. 12 is a block diagram showing an example of a schematicconfiguration of an eNB to which the technology according to the presentdisclosure can be applied. An eNB 2300 includes one or more antennas2310 and a base station device 2320. The base station device 2320 may beconnected to each of the antennas 2310 via a radio frequency (RF) cable.

Each of the antennas 2310 includes one or more antenna elements (such asmultiple antenna elements included in a multiple-input multiple-output(MIMO) antenna), and is for the base station device 2320 to transmit andreceive a wireless signal. As shown in FIG. 12, the eNB 2300 may includemultiple antennas 2310. For example, the multiple antennas 2310 may becompatible with multiple frequency bands used by the eNB 2300. AlthoughFIG. 12 shows the example in which the eNB 2300 includes multipleantennas 2310, the eNB 2300 may include a single antenna 2310.

The base station device 2320 includes a controller 2321, a memory 2322,a network interface 2323 and a radio communication interface 2325.

The controller 2321 may be for example a CPU or a DSP, and operatesvarious functions of a high layer of the base station device 2320. Forexample, the controller 2321 generates a data package based on data of asignal processed by the radio communication interface 2325, andtransfers the generated package via the network interface 2323. Thecontroller 2321 may bundle data from multiple baseband processors togenerate a bundling package, and transfers the generated bundlingpackage. The controller 2321 may have a logical function for performingthe following controls: radio resource control, radio bearer control,mobility management, admission control and scheduling. The control maybe performed in conjunction with a nearby eNB or core network node. Thememory 2322 includes RAM and ROM, and stores programs to be executed bythe controller 2321 and various types of control data (such as aterminal list, transmission power data and scheduling data).

The network interface 2323 is a communication interface for connectingthe base station device 2320 to a core network 2324. The controller 2321may communicate with a core network node or another eNB via the networkinterface 2323. In this case, the eNB 2300 may be connected with thecore network node or other eNBs via a logic interface (such as aninterface Si and an interface X2). The network interface 2323 may be awired communication interface or a radio communication interface forwireless backhaul routing. If the network interface 2323 is a radiocommunication interface, the network interface 2323 may use a frequencyband for wireless communication higher than that used by the radiocommunication interface 2325.

The radio communication interface 2325 supports any cellularcommunication scheme (such as Long Term Evolution (LTE) andLTE-advanced), and provides a wireless connection to a terminal locatedin a cell of the eNB 2300 via the antenna 2310. The radio communicationinterface 2325 may generally include for example a BB processor 2326 andan RF circuit 2327. The BB processor 2326 may perform for examplecoding/decoding, modulation/demodulation andmultiplexing/demultiplexing, and performs various types of signalprocessing of layers (such as L1, Media Access Control (MAC), Radio LinkControl (RLC) and Packet Data Convergence Protocol (PDCP)). Instead ofthe controller 2321, the BB processor 2326 may have a portion or all ofthe above logical functions. The BB processor 2326 may be a memorystoring communication control programs, or a module including aprocessor and a related circuit which are configured to executeprograms. In this way, the function of the BB processor 2326 may bechanged when the programs are updated. The module may be a card or bladeinserted into the slot of the base station device 2320. Alternatively,the module may be a chip mounted on the card or the blade. Meanwhile,the RF circuit 2327 may include for example a frequency mixer, a filterand an amplifier, and transmit and receive a wireless signal via theantenna 2310.

As shown in FIG. 12, the radio communication interface 2325 may includemultiple BB processors 2326. For example, the multiple BB processors2326 may be compatible with the multiple frequency bands used by the eNB2300. As shown in FIG. 12, the radio communication interface 2325 mayinclude multiple RF circuits 2327. For example, the multiple RF circuits2327 may be compatible with multiple antenna elements. Although FIG. 12shows an example in which the radio communication interface 2325includes multiple BB processors 2326 and multiple RF circuits 2327, theradio communication interface 2325 may include a single BB processor2326 or a single RF circuit 2327.

In the eNB 2300 shown in FIG. 12, the transceiver may be realized by theradio communication interface 2325, and at least a portion of functionsof the units described in conjunction with FIG. 7 and FIG. 8 may berealized by the controller 2321. For example, the controller 2321 mayperform at least a portion of functions of the units described inconjunction with FIG. 7 and FIG. 8 by performing programs stored in thememory 2322.

[Application Example of an Automobile Navigation Device]

FIG. 13 is a block diagram showing an example of a schematicconfiguration of an automobile navigation device 1320 to which thetechnology according to the present disclosure may be applied. Theautomobile navigation device 1320 includes a processor 1321, a memory1322, a global positioning system (GPS) module 1324, a sensor 1325, adata interface 1326, a content player 1327, a storage medium interface1328, an input apparatus 1329, a display apparatus 1330, a speaker 1331,a radio communication interface 1333, one or more antenna switches 1336,one or more antennas 1337 and a battery 1338.

The processor 1321 may be for example a CPU or an SoC, and controls anavigation function and additional function of the automobile navigationdevice 1320. The memory 1322 includes RAM and ROM, and stores programsexecuted by the processor 1321 and data.

The GPS module 1324 determines the location of the automobile navigationdevice 1320 (such as latitude, longitude and height) with a GPS signalreceived from a GPS satellite. The sensor 1325 may include a group ofsensors such as a gyroscope sensor, a geomagnetic sensor and an airpressure sensor. The data interface 1326 is connected to for example anon-board network 1341 via a terminal not shown, and acquires datagenerated by the automobile (such as vehicle speed data).

The content player 1327 reproduces contents stored in a storage medium(such as CD and DVD) which is inserted into the storage medium interface1328. The input apparatus 1329 includes for example a touch sensorconfigured to detect touch on a screen of the display apparatus 1330, abutton or a switch, and receives an operation or information inputted bythe user. The display apparatus 1330 includes a screen of a display suchas an LCD or OLED, and displays an image of navigation function or thereproduced contents. The speaker 1331 outputs voice of the navigationfunction or the reproduced contents.

The radio communication interface 1333 supports any cellularcommunication scheme (such as LTE and LTE-advanced), and performswireless communication. The radio communication interface 1333 maygenerally include for example a BB processor 1334 and an RF circuit1335. The BB processor 1334 may perform for example coding/decoding,modulation/demodulation and multiplexing/demultiplexing, and performvarious types of signal processing for wireless communication.Meanwhile, the RF circuit 1335 may include for example a frequencymixer, a filter and an amplifier, and transmit and receive a wirelesssignal via the antenna 1337. The radio communication interface 1333 maybe a chip module on which the BB processor 1334 and the RF circuit 1335are integrated. As shown in FIG. 13, the radio communication interface1333 may include multiple BB processors 1334 and multiple RF circuits1335. Although FIG. 13 shows the example in which the radiocommunication interface 1333 includes multiple BB processors 1334 andmultiple RF circuits 1335, the radio communication interface 1333 mayinclude a single BB processor 1334 or a single RF circuit 1335.

In addition to the cellular communication scheme, the radiocommunication interface 1333 may support an additional type of wirelesscommunication scheme, such as a short-distance wireless communicationscheme, a near field communication scheme and a wireless LAN scheme. Inthis case, the radio communication interface 1333 may include a BBprocessor 1334 and an RF circuit 1335 for each of the wirelesscommunication schemes.

Each of the antenna switches 1336 switches a connection destination ofthe antenna 1337 between multiple circuits (such as circuits fordifferent wireless communication schemes) included in the radiocommunication interface 1333.

Each of the antennas 1337 includes one or more antenna elements (such asmultiple antenna elements included in the MIMO antenna), and is for theradio communication interface 1333 to transmit and receive a wirelesssignal. As shown in FIG. 13, the automobile navigation device 1320 mayinclude multiple antennas 1337. Although FIG. 13 shows the example inwhich the automobile navigation device 1320 includes multiple antennas1337, the automobile navigation device 1320 may include a single antenna1337.

In addition, the automobile navigation device 1320 may include antennas1337 for different wireless communication schemes. In this case, theantenna switch 1336 may be to omitted in the configuration of theautomobile navigation device 1320.

The battery 1338 supplies power to the modules of the automobilenavigation device 1320 shown in FIG. 13 via a feed line. The feed lineis partially shown with a dash line in the drawing. The battery 1338accumulates the power provided from the vehicle.

In the automobile navigation device 1320 shown in FIG. 13, thetransceivers described in conjunction with FIG. 4 and FIG. 5 may beimplemented by the radio communication interface 1333. The storagedescribed in conjunction with FIG. 5 may be implemented by the memory1322. The processor 1321 may perform at least a portion of functions ofthe units described in conjunction with FIG. 1 to FIG. 5 by executingprograms stored in the memory 1322.

The technology according to the present disclosure may be furtherimplemented as an on-board system (or a vehicle) 1340 including one ormore of the automobile navigation device 1320, the on-board network 1341and a vehicle module 1342. The vehicle module 1342 generates vehicledata (such as a vehicle speed, a motor speed and fault information) andoutputs the generated data to the on-board network 1341.

In the above description of the embodiments of the present disclosure,features that are described and/or illustrated with respect to oneembodiment may be used in the same way or in a similar way in one ormore other embodiments, may be combined with or instead of the featuresof the other embodiments.

It should be emphasized that the term “comprises/comprising” used inthis specification refers to the presence of features, elements, stepsor components, but does not preclude the presence or addition of one ormore other features, elements, steps or components.

In the above embodiments and examples, the steps and/or units arerepresented with reference numbers consists of numbers. It should beunderstood by those skilled in the art that, these reference numbers areonly for convenience of the description and drawing, and are notintended to represent an order of the steps and units or to representany other constraint.

In addition, the methods according to the present disclosure are notlimited to be executed in the time sequence described in thespecification, and may be executed in other time sequence, parallel orindependently. Therefore, the execution order of the method described inthe specification is not intended to limit the technical scope of thepresent disclosure.

While the present disclosure has been disclosed with reference to thespecific embodiments thereof, it should be understood that all of theabove embodiments and examples are illustrative rather than restrictive.Those skilled in the art will appreciate that various modifications,improvements and equivalents are possible, without departing from thespirit and scope of the appended claims. These modifications,improvements or equivalents are intended to be included within theprotection scope of the present disclosure.

1. A wireless communication device, comprising: circuitry configured to:acquire a type of information to be transmitted via a device-to-device(D2D) communication, the type being one of a plurality of types thatincludes at least a first type and a second type; and determine atransmission power for transmitting the information based on a powercontrol parameter received from a base station, the power controlparameter indicating a path loss and the power control parameter beingrelated to a priority of the information.
 2. The wireless communicationdevice according to claim 1, wherein the type is predefined based on atleast one of content of the information and a scenario in which theinformation is to be sent.
 3. The wireless communication deviceaccording to claim 1, wherein the circuitry is configured to select acommunication resource, for transmitting the information in a case thatthe type is the first type, from dedicated communication resources whichare used for the D2D communication.
 4. The wireless communication deviceaccording to claim 1, wherein the circuitry is configured to determinethe transmission power for the information as a first predeterminedpower in a case that the type is the first type.
 5. The wirelesscommunication device according to claim 1, wherein in a case that thetype is the first type, the information comprises safety information. 6.The wireless communication device according to claim 1, wherein thecircuitry is configured to select, in a case that the type is the secondtype, a communication resource for transmitting the information fromshared communication resources which are used for the D2D communicationand communication between the base station and a user equipment.
 7. Thewireless communication device according to claim 6, wherein thecircuitry is configured to select a communication resource fortransmitting the information from reserved communication resources inthe shared communication resources, and the D2D communication has apriority in utilizing the reserved communication resources overcommunication between the base station and the user equipment.
 8. Thewireless communication device according to claim 7, wherein the reservedcommunication resources comprise a communication resource of anunlicensed frequency band.
 9. The wireless communication deviceaccording to claim 1, wherein the circuitry is configured to determine,in a case that the type is the second type a transmission power for theinformation based on a priority of the information.
 10. The wirelesscommunication device according to claim 9, wherein the circuitry isconfigured to determine the transmission power for the information basedon a power control parameter received from the base station, and thepower control parameter being associated with the priority.
 11. Thewireless communication device according to claim 9, wherein thecircuitry is configured to determine the transmission power for theinformation based on a power control parameter set received from thebase station, and the power control parameter set comprises powercontrol parameters for information with different priorities.
 12. Thewireless communication device according to claim 1, wherein the wirelesscommunication device operates as a user equipment.
 13. The wirelesscommunication device according to claim 12, further comprising: atransceiver configured to receive radio resource control (RRC) signalingfrom a base station, wherein the (RRC) carries a power control parameterfor the user equipment to transmit the information.
 14. The wirelesscommunication device according to claim 12, wherein the user equipmentis a vehicle.
 15. A wireless communication method, comprising: acquiringa type of information to be transmitted via a device-to-device (D2D)communication, the type being one of a plurality of types that includesat least a first type and a second type; and determining a transmissionpower for transmitting the information based on a power controlparameter received from a base station, the power control parameterindicating a path loss and the power control parameter being related toa priority of the information.
 16. A wireless communication device for abase station, the wireless communication device comprising: circuitryconfigured to: determine a type of information to be transmitted by auser equipment via a device-to-device (D2D) communication based onindication information from the user equipment, the type being one of aplurality of types that includes at least a first type and a secondtype; and transmit a power control parameter to the user equipment, thepower control parameter indicating a path loss and the power controlparameter being related to a priority of the information.
 17. Thewireless communication device according to claim 16 wherein thecircuitry is configured to select, in a case that the type is the firsttype, a communication resource for transmitting the information fromdedicated communication resources which are used only for the D2Dcommunication.
 18. The wireless communication device according to claim16, wherein the circuitry is configured to allocate, for the informationof the first type, for different user equipment frequency spectrumsorthogonal to one another.
 19. The wireless communication deviceaccording to claim 16, wherein the circuitry is configured to select, ina case that the type is the second type, a communication resource fortransmitting the information from shared communication resources whichare used for the D2D communication and communication between the basestation and the user equipment.
 20. The wireless communication deviceaccording to claim 19, wherein the circuitry is configured to select acommunication resource for transmitting the information from reservedcommunication resources in the shared communication resources, and thereserved communication resources are allocated to the D2D communicationwith a priority over communication traffic of the base station.